Centrifugal governor for fordson tractors



G. E. CANFIELD.

CENTRIFUGAL GOVERNOR FOR FORDSON TRACTORS.

APPLICATION FILED FEB. 13, 1920.

11; 1921. 2 SHEETS-SHEET I.

Patented Oct llI|| Hill I N VEN 7-0/7. 650065 15 Cfl/VF/ELD, BY ///5HTTORNEYS.

G. E. CANFIELD.

CENTRIFUGAL GOVERNOR FOR FORDSON TRACTORS.

APPLICATION FILED 8.13.1920.

Pateilted Oct. 11, 1921.

2 SHEETS-SHEET 2.

UNITED STATES- PATENT) ornca.

GEORGE E. OANFIELD, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO JAMES H.

DODSON, OF MINNEAPOLIS, MINNESOTA.

csn'rnrroeaneovnmroa roa ronnson 'rnac'rorss.

Application filed February To all whom it may concern:

Be it known that I, GEORGE E. GARFIELD,

new and useful. Improvements in Centrifu gal Governors for FordsonTractors; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which'it appertains to make and use the same. j p

This invention, as well as rlni pending aparch 22, 1919,

as for its particular ob'ect the provision of an improved governor]or'the well known Fordson tractors, and the present invention is in thenature ofa modification or refinement of the earlier form disclosed inthe said pending applicat1on.-:

-Generally stated, the invention consists of the novel'devices andcombinations of desome 1 parts vices hereinafter'described and definedin the claims. 1

In the accompanying drawmgs which illustrate the invention, likecharacters indicate like parts throu bout the several views.

Referring to the rawings Figure 1 is a side elevatlon with some partssectioned and some parts broken away,

showing the improved governor applied to a Fordson tractor; i i

Fig. 2 is a 1plan viewof the overnor. and certaln" of ,t e connections"thereto, some parts being sectioned, and some parts being broken away; v

Fig. 3 is a fragmentary view in axial section throu h that portion ofthe vapor in take mani old in'which the throttle valve is applied, thesame being a section approximately on the line 3-3 of Fig. 1;

Fig. i is an edge elevationofthe duplex throttle valve;

, Fig. 5 is a face elevation showing the two parts of the duplexthrottle valve separated; Fig. 6 is a side elevation of, the governor,arts being broken away and some eing sectioned; and i Fig. 7 is asection on the line 7- of Fig. 6. Y Y

f the parts of the Fordson tractor, it is only desirable for'the'purposes of this case to particularly note the front wheels'8, theradiator 9, the hood 10, the cylinder and crank case castings-11, thefuel intake mani- Specification of Letters r am. Patented Oct. 11, 1921.

1a, 1920. Serial naflasasai.

fold, 12, the exhaust. manifold 13 and engine camshaft 14. The throttlevalve here employed is of a duplex character and is'made up of two disks15 and 16 having .notches 15 and 16, respectively, that are adapted tointerlap so as to adapt the two vapor intake manifold 12 and/the. disk15 is connected to the inner end of a rearrod 19 w1 reach of theoperator of the tractor, so that the said disk 15 may be operated as athrottle valve acting in the customary manner,

while the disk 16 is left in-an open position.

Moreover, by oscillations of the rod 20, the disk 16 may be operated asa throttle valve,

while the disk 15 is left in an open position. Y

The said rod 20 will be oscillated automatically by my improved governorso that there is rovided means for operating the throttle jva ve eitherat will'or automatically by the governor.

The governor com perand lower portions of a governor casing 22, thelatter being preferab .be operated in t e customary way by connectionsthat extend to within y a hollow cast shaft shown in Thejthrottle valve?2 1s located in a tubularjportion 12 of the rises an upright shaft 21 journaled in suite 1e bearings in the up-' shell made up of twopartsseparablyunited .by a horizontal joint 22 and'ldetachably butrigidly connected together; by machine screws 23, or the like. The up erendof the shaft 21 is mounted in a com ined bear- 'in and thrust bearing24 preferably of the I bal bearing type and. which is seated in a hubportion 25 of the casing I v Surrounding the vhub 25 and rising abovethe same, the upper section of the governor 22 is formed withv an.annular flange or cup structure 26 that is adapted to con- '-tain oil,but "which performs a more important-function in that'it 'sppports'thecap-' like shell 27 of the current distributer. or timer. The saidshell- 27 is telescoped onto thereduced upper end oftheflange 26 and isyieldinglly pressed downward by a spring arm'28's own as anchored to alug on a hollow dome-like extension 29 of the upper section of thegovernor casing. The shell 27 supports the relatively stationarycontacts 27 of the current distributer, said contacts being insulatedfrom the shell 27 and having projecting binding posts 30 to which theleads of the ignition circuit will be connected in the customary way.The movable contact member 31 of the distributes is carried by theextreme upper end of-the shaft 21 and moves over the contacts 27 in thecustomary way to produce the sparks in the several cylinders withproperly timed actions. By meanshereinafter described, the shell 27 maybe oscillated slightly in advance or retard the spark.

At its lower end, just above its lower bearing, the shaft 21 is providedwith a splral gear 32 that meshes with a spiral gear 33 onthe forwardlyprojecting end of the engine crank shaft 14, said ear being of such sizethat the shaft 21 is riven at the same speed as the crank shaft 14.

The governor casing 22, just below its flange 26 is bulged out to afl'ord space and clearance for the two weighted governor arms 34 that arepivoted at 35 to a collar 36 on the shaft 21. The weighted arms 34 areprovided at points offset from, their pivots with bearing pointsafforded, as shown, by small anti-frlction rollers 34 that engage adisk-like flange or plate 37 mounted to slide vertically on the shaft21. Loosely mounted for both rotary and sliding movements on the shaft21 is a flanged sleeve 38 between which and the hub of the plate 37,

a ball bearing 39 is interposed so that the said disks 37 may be freelyrotated with the shaft 21 and with the weighted levers 34 withoutcausing the flange sleeve 38 to rotate.

The numeral 40 indicates an L-shaped lever that operates much like abell crank, but which is pivotally connected to internal lugs 41 on theuppersection of the casing 22 at 42, the said pivot being locatedbetween the elbow and the inner extremity of the lower arms'of saidlever. Here it should be noted that the inner end of the lower arm ofthe lever 40 is bifurcated or pronged so that it straddles the body ofthe sleeve 38 and rests upon the flange thereof.

v The outer ortion of the lever 40 is yieldingly presse upward by acoiled spring 43 compressed between the elbow thereof and the inner endof an adjusting screw 44 that works with threaded'eng gement through theoffset portion of vthe casing 22.

At the upper end of its upright arm, the lever 40 is shown as providedwith a slot 45 that is engaged by the crank pin 46 of a short crank arm47 secured on the front end of the heretofore noted throttle valve rod20, the latter, as will now be noted, being extended forward and intothe drum 29 of the governor casing.

The numeral 48 indicates a small tube that extends from the bottom ofthe cup formed within the flange 26 and terminates in position todeliver oil directly onto the ball bearing 39. In Figs. 1 and 2, thenumeral 49 indicates a small rock shaft that extends forward'from thepoint within reach of the operator, is mounted in suitable bearings 50on the exterior of the cylinder casting, and

at its front end, has a short arm 51, .which, by a link 52, is connectedto an outstanding lug 53 on the distributer shell 27, so that byoscillation of said shaft 49, the relatively fixed contacts of thedistributer may be moved to retard or advance the spark.

As a'simple and efficient means of d8l321Cllably but rigidly securingthe governor casing to the crank case of the engine, said casing isprovided with offset bosses 54 to which the front ends of threaded studs55' are attached by-means of nuts 56; and the rear ends of these studsare preferably applied as substitutes for certain other cus tomary bolts57 that connect the front end of the crank shaft casing to the body ofsaid crank casing.

The timer connected as above described will be operated so far as itstime action is concerned, exactly like the distributer which hashitherto been attached directly to the cam shaft to the engine, but itis raised to an elevated position where it will be protected from mud,dirt, oil, or'the like, and hence, less likely to be short circuited.

When the engine i running at slow speed, the weighted governor levers 34will drop, being acted upon both by gravity and the tension of thespring 43, and lever 40 will then be set in position to hold thethrottle valve disk 16 into an open or nearly open position. v

When the engine begins to speed up, the weighted levers 34 will bethrown outward by the action of centrifugal force, and acting againstthe tension of spring 43, will move the upper end of lever 40 toward theleft in respect to Fig. 7, and its slotted upper end acts on pin 46 ofarms '45, will oscillate rod 47 and cause the latter to move throttlevalve disk 16 toward a closed position, and to close the said throttlevalve whenever the engine has acquired a certain predetermined desiredmaximum speed. This predetermined maximum speed of the engine may bevaried by adjustments of the tension ofthe spring 43.

When the speed of the engine. is decreased below the predeterminedmaximum speed,

spring 43'will begin to overcome the-centrifugal force exerted throughlevers 34 so that better supply of vapor is afforded and this, ofcourse, tends to again speed up the engine. Thus, the governor acts,irrespec 'tive of the workthat'the engine is doing or the load that itis carrying, to automatically maintain a constant speed of the engine,and hence a predetermined constant advance movement of the tractor.

It will be noted that all of the working parts of the governor and ofthe distributer are compactly assembled and all inclosed and rotectedfrom the elements.

What I claim is:

1. The combination with a tractor having an internal combustion engine,of a throttle valve for controlling the fuel supply thereto, of anupright governor shaft driven from a running part of the en ine, acentrifugal governor carried by said sliaft, a lever subject to saidgovernor, a spring acting directly upon one side of said lever, a casinginclosing said shaft, said governor and said spring pressed lever, andan operating rod connected to said throttle valve and extending intosaid governor casing and provided with a connection therein to saidspring pressed lever Wherebysaid throttle valve will be aut0maticallyoperated from said governor.

2. The combination with a tractor having an internal combustion engineand a throttle valve for controlling the fuel supply thereto, of agovernor casing secured to the front of the engine, an upright governorshaft working in said casing and provided with weighted levers rotatabletherewith and working within said casing, means for driving said shaftfrom a running shaft to the engine, a spring pressed lever within andhaving a lateral arm extending upwardly at one side of said casingarranged to be oscillated by said weighted levers under rotation of saidshaft, and a rod extended from said throttle valve into said governorcasing and having a connection to said spring-pressed lever whereby saidthrottle valve will be automatically controlled.

3.- The combination with a tractor having an internal combustion engine,of a throttle valve for controlling the fuel supply thereto, of anupright governor shaft driven from a running part of the engine, acentrifugal governor carried by said shaft, a lever having an upwardlyextending arm at one side of said shaft subject to said governor acompression spring below said arm, a casing including said shaft leverand spring, said governor and said spring pressed lever, an operatingrod connected to said throttle valve and extended into saidgovernorcasing and provided with a connection therefor to said spring-pressedlever whereby said throttle valve will be automatically operated fromsaid governor, and a current distributer having a cup-like casingdetachably mounted directly on the upper end of said upright shaft, saiddistributer casing supporting the relatively fixed contacts of thedistributor, and the upper end of said shaft carrying the movableelement of said distributer.

4. The combination with a tractor having an internal combustion engineand a throttle valve for controlling the fuel supply thereto,

within said casing, a plate pivoted to said levers above the same, meansfor driving said shaft from a running shaft to the engine, a leverpivoted at one side of said shaft having its inner end bearing on saidplate and an upwardly extending arm at its other end substantiallyparallel tosaid shaft, a compression spring pressing upwardly on saidarm, a rod extended from said throttle valve into said governor casingand having a connection to said spring-pressed lever whereby saidthrottle valve will be automatically controlled, and a currentdistributer having a cup-like casing detachably mounted directly on theupper end of said upright shaft, said distributer casing supporting therelatively fixed contacts of the distributer and the upper end of saidshaft carrying the movable element of said distributor.

5. The combination with a tractor having an internal combustionengine,'of a throttle valve for controlling the fuel supply thereto, ofan upright governor shaft driven from a running part of the engine, acentrifugal governor carried by said shaft, a springpressed leversubject to said governor, a casing including said shaft, said governorand said spring-pressed lever, an operating rod connected to saidthrottle valve and extended into said governor casing and provided witha connection therefor to said spring-pressed lever whereby said throttlevalve w ill be a utomatically operated from said governor, and a currentdistributor having a cup-like cas ing detachably mounted directly on theupper end of said upright shaft, said distributer casing supporting therelatively fixed contacts of the distributer, and the upper end of saidshaft carrying the movable. element of said distributer, the said casingbeing formed with an oil cup directly below said distributer and havin athrust bearing for said shaft located in t e bottom of said oil cup.

6. The combination with a tractor having an internal combustion en ine,of a throttle valve for controlling the el supply thereto, of an uprightgovernor shaft driven from a running part of the engine, a centrifugalgovernorcarried by said shaft, a spring-pressed lever subject to saidgovernor, a casing including said shaft, said governor and said springpressed lever, an operatlng rod connected to said throttle valve andextended into said governor casing and cup-like casing detachably"mounted directly I per end of said shaft carrying the movable elementsof said .distributer, the said casing being formed with alloileupdirectly below said distributer and having a thrust bearing forsaid shaft located in the bottom of said oil cup, and an oil deliverytube extending 10 from said oil cup downward into said governor casingand toward said upright shaft.

In testimony whereof I afiix my signatiire in presence of two Witnesses.

GEORGE E. CANFIELD. Witnesses: i

HARRY D. KILGORI), EVA E'. Konrad

